Sounds we cannot hear /
Kudryavtsev, B.
Sounds we cannot hear / B. Kudryavtsev ; Popular scientific Library ; Translated from the russian by David Sobolev ; Designed by N. Crishin. - Moscow : Foreign Languages Publishing House, 1958. - 154 p : ill ; 20 cm.
Russian literature
Sounds we cannot hear / B. Kudryavtsev ; Popular scientific Library ; Translated from the russian by David Sobolev ; Designed by N. Crishin. - Moscow : Foreign Languages Publishing House, 1958. - 154 p : ill ; 20 cm.
Russian literature